The phosphorylation of FOXA1-S331 is indispensable for FOXA1-AR dependent cistrome [ATAC-seq]

To define the function of FOXA1-S331 phosphorylation, we substituted S331 in both FOXA1 alleles for alanine in C4-2 cells via CRISPR/Cas9-based gene editing, thereby generating phosphorylation incompetent FOXA1S331A cells. We directly assessed the consequences of phospho-incompetent FOXA1S331A mutation on the transcription profile, chromatin deposition of FOXA1, AR, H3K27ac and chromatin accessibility. Overall design: Examination of chromatin accessibility in WT and FOXA1S331A C4-2 cells.